"'Curly Q. Links'" <motsco__@interbaun.com> wrote in
news:4477DF1A.20C02689@interbaun.com:

> Imagnat wrote:
>>
>> I have a '93 Accord 10th Anniversary Ed. Automatic. I've owed the car
>> for about 6 months and I have a couple of different problems that I
>> hope someone can help with.
>>
>> 1) The engine has a rough idle when warm (500-750 rpms). When I shift
>> out of gear and into Neutral or Park it smooths out quite a bit, but
>> not completely. It also goes away when driving or pressing the
>> accelerator.
>>
>> 2) When I am cruising at a steady speed (say between 60-70 mph) on
>> level highway, I've noticed that the rpms will jump up about 500 rpms
>> for no reason. It feels like a minor gear shift, but with the level
>> terrain and the constant speed it shouldn't be shifting. It does this
>> "shift" continuoisly back and forth.
>>
>> 3) I've recently noticed the smell of burning oil when the car is
>> parked, but no signs of an oil leak. I had the valve cover and spark
>> plug gaskets replaced a few months ago, but this has only started with
>> in the past few weeks. Occasionally, there is a puff of white/blue
>> smoke that comes from the exhaust on start up.
>>
>> If you have had similar problems or have suggestions to correct them
>> please let me know. Thnx.
>
>
>
> --------------------------------------------------
>
> Even without knowing the mileage, I'll bet your Throttle Position Sensor
> is worn out. High mileage and Cruise Control, Prairies? That's the
> formula for wearing out a TPS, which will cause the RPM fluctuation. It
> will go away if you drive into a headwind. :-)
>
> You don't have to change the whole thing. Search it out thoroughly
> before paying somebody to fix it.
>



You can also easily check it with a voltmeter. Backprobe the middle wire
and check for smooth voltage transition from closed to wide-open throttle.
Use an analog VOM. Autoranging digital ones can switch ranges part way
through, causing what appears to be a hitch in power.

--
TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/